Select a destination to see more weather parameters. 33. Report â¦ Expect higher hotel prices and crowded beaches. The average sunshine in August is 8.7h. Sea Temperature 29 °C 84 °F. Samana Weather August Averages, Dominican Republic. August is a hot and dry time for sunbathing in Punta Cana.August is an excellent month for swimming in Punta Cana with very warm sea temperatures. Sunshine Hours 9 hours. Bavaro. August weather forecast for Punta Cana, Dominican Republic. Access hourly, 10 day and 15 day forecasts along with up to the minute reports and videos from AccuWeather.com Below are average maximum temperatures at popular destinations in the Dominican Republic in August. Get the Dominican Republic weather forecast. The Dominican Republic enjoys a warm climate all year round, making it a popular holiday destination with coconut trees lining the beaches, mild sea waters and tropical scenery towards the mainland.. Rainfall Days 13 days. High Temperature 31 °C 88 °F. Dominican Republic. Luckily, the weather is warm year-round, with average highs around 80 degrees Fahrenheit. Punta Cana, La Altagracia, Dominican Republic Weather History star_ratehome. Dominican Republic; When to go and weather; Dominican Republic in detail. The atmosphere is warm, with morning temperatures around 29° C. However, the highest temperature does not exceed 32° C, which is still acceptable. 76 F Punta Cana International Airport Station | Report. 33. Low Temperature 23 °C 73 °F. Get the monthly weather forecast for Cabarete, Puerto Plata, Dominican Republic, including daily high/low, historical averages, to help you plan ahead. Consider visiting Punta Cana in the months of July, August, September, October, for the best beach weather.Also consider one of our other suggestions for August. Bayahibe. 32. Temperature 27 °C 81 °F. Rainfall 104 mm. Whale-watching runs from around mid-January to mid-March. August. August, the last month of the summer, is another tropical month, with temperature in the range of an average low of 24.8°C (76.6°F) and an average high of 30.7°C (87.3°F). 32. High Season (mid-DecâFeb) July to August and the week before Easter are also high season. La Romana. When to go and weather. Current weather in Punta Cana and forecast for today, tomorrow, and next 14 days In other words, this means that the climate throughout August in Punta Cana remains rather pleasant. Temperatures rarely fluctuate with lows of 25°C and highs of 28°C in the peak of summer.